// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifdef _WIN32
#include "boinc_win.h"
#else
#include "config.h"
#endif

#include "parse.h"
#include "util.h"
#include "error_numbers.h"
#include "filesys.h"
#include "file_names.h"
#include "client_msgs.h"
#include "client_state.h"

void CLIENT_STATE::set_client_state_dirty(const char* source) {
    if (log_flags.state_debug) {
        msg_printf(0, MSG_INFO, "[state_debug] set dirty: %s\n", source);
    }
    client_state_dirty = true;
}

static bool valid_state_file(const char* fname) {
    char buf[256];
    FILE* f = boinc_fopen(fname, "r");
    if (!f) return false;
    fgets(buf, 256, f);
    if (!match_tag(buf, "<client_state>")) {
        fclose(f);
        return false;
    }
    while (fgets(buf, 256, f)) {
        if (match_tag(buf, "</client_state>")) {
            fclose(f);
            return true;
        }
    }
    fclose(f);
    return false;
}

// Parse the client_state.xml file
//
int CLIENT_STATE::parse_state_file() {
    PROJECT *project=NULL;
    char buf[256];
    int retval=0;
    int failnum;
    const char *fname;

    // Look for a valid state file:
    // First the regular one, then the "next" one.
    //
    if (valid_state_file(STATE_FILE_NEXT)) {
        fname = STATE_FILE_NEXT;
    } else if (valid_state_file(STATE_FILE_NAME)) {
        fname = STATE_FILE_NAME;
    } else if (valid_state_file(STATE_FILE_PREV)) {
        fname = STATE_FILE_PREV;
    } else {
        if (log_flags.state_debug) {
            msg_printf(0, MSG_INFO,
                "[state_debug] CLIENT_STATE::parse_state_file(): No state file; will create one"
            );
        }

        // avoid warning messages about version
        //
        old_major_version = BOINC_MAJOR_VERSION;
        old_minor_version = BOINC_MINOR_VERSION;
        old_release = BOINC_RELEASE;
        return ERR_FOPEN;
    }

    FILE* f = fopen(fname, "r");
    MIOFILE mf;
    mf.init_file(f);
    while (fgets(buf, 256, f)) {
        if (match_tag(buf, "</client_state>")) {
            break;
        } else if (match_tag(buf, "<client_state>")) {
            continue;
        } else if (match_tag(buf, "<project>")) {
            PROJECT temp_project;
            retval = temp_project.parse_state(mf);
            if (retval) {
                msg_printf(NULL, MSG_ERROR, "Can't parse project in state file");
            } else {
                project = lookup_project(temp_project.master_url);
                if (project) {
                    project->copy_state_fields(temp_project);
                } else {
                    msg_printf(&temp_project, MSG_ERROR,
                        "Project %s is in state file but no account file found",
                        temp_project.get_project_name()
                    );
                }
            }
        } else if (match_tag(buf, "<app>")) {
            APP* app = new APP;
            retval = app->parse(mf);
            if (!project) {
                msg_printf(NULL, MSG_ERROR,
                    "Application %s outside project in state file",
                    app->name
                );
                delete app;
                continue;
            }
            if (project->anonymous_platform) {
                delete app;
                continue;
            }
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse application in state file"
                );
                delete app;
                continue;
            }
            retval = link_app(project, app);
            if (retval) {
                msg_printf(project, MSG_ERROR,
                    "Can't handle application %s in state file",
                    app->name
                );
                delete app;
                continue;
		    }
            apps.push_back(app);
        } else if (match_tag(buf, "<file_info>")) {
            FILE_INFO* fip = new FILE_INFO;
            retval = fip->parse(mf, false);
            if (!project) {
                msg_printf(NULL, MSG_ERROR,
                    "File info outside project in state file"
                );
                delete fip;
                continue;
            }
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't handle file info in state file"
                );
                delete fip;
                continue;
            }
            retval = link_file_info(project, fip);
            if (project->anonymous_platform && retval == ERR_NOT_UNIQUE) {
                delete fip;
                continue;
            }
            if (retval) {
                msg_printf(project, MSG_ERROR,
                    "Can't handle file info %s in state file",
                    fip->name
                );
                delete fip;
                continue;
            }
            file_infos.push_back(fip);
            // If the file had a failure before,
            // don't start another file transfer
            //
            if (fip->had_failure(failnum)) {
                if (fip->pers_file_xfer) {
                    delete fip->pers_file_xfer;
                    fip->pers_file_xfer = NULL;
                }
            }
            if (fip->pers_file_xfer) {
                retval = fip->pers_file_xfer->init(fip, fip->upload_when_present);
                if (retval) {
                    msg_printf(project, MSG_ERROR,
                        "Can't initialize file transfer for %s",
                        fip->name
                    );
                }
                retval = pers_file_xfers->insert(fip->pers_file_xfer);
                if (retval) {
                    msg_printf(project, MSG_ERROR,
                        "Can't start persistent file transfer for %s",
                        fip->name
                    );
                }
            }
        } else if (match_tag(buf, "<app_version>")) {
            APP_VERSION* avp = new APP_VERSION;
            retval = avp->parse(mf);
            if (!project) {
                msg_printf(NULL, MSG_ERROR,
                    "Application version outside project in state file"
                );
                delete avp;
                continue;
            }
            if (project->anonymous_platform) {
                delete avp;
                continue;
            }
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse appliation version in state file"
                );
                delete avp;
                continue;
            } 
            retval = link_app_version(project, avp);
            if (retval) {
                msg_printf(project, MSG_ERROR,
                    "Can't handle application version in state file"
                );
                delete avp;
                continue;
            }
            app_versions.push_back(avp);
        } else if (match_tag(buf, "<workunit>")) {
            WORKUNIT* wup = new WORKUNIT;
            retval = wup->parse(mf);
            if (!project) {
                msg_printf(NULL, MSG_ERROR,
                    "Workunit outside project in state file"
                );
                delete wup;
                continue;
            }
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse workunit in state file"
                );
                delete wup;
                continue;
            }
            retval = link_workunit(project, wup);
            if (retval) {
                msg_printf(project, MSG_ERROR,
                    "Can't handle workunit in state file"
                );
                delete wup;
                continue;
            }
            workunits.push_back(wup);
        } else if (match_tag(buf, "<result>")) {
            RESULT* rp = new RESULT;
            retval = rp->parse_state(mf);
            if (!project) {
                msg_printf(NULL, MSG_ERROR,
                    "Task %s outside project in state file",
                    rp->name
                );
                delete rp;
                continue;
            }
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse task in state file"
                );
                delete rp;
                continue;
            }
            retval = link_result(project, rp);
            if (retval) {
                msg_printf(project, MSG_ERROR,
                    "Can't link task %s in state file",
                    rp->name
                );
                delete rp;
                continue;
            }
            results.push_back(rp);
        } else if (match_tag(buf, "<project_files>")) {
            if (!project) {
                msg_printf(NULL, MSG_ERROR,
                    "Project files outside project in state file"
                );
                skip_unrecognized(buf, f);
                continue;
            }
            project->parse_project_files(mf, false);
            project->link_project_files(false);
        } else if (match_tag(buf, "<host_info>")) {
            retval = host_info.parse(mf);
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse host info in state file"
                );
            }
        } else if (match_tag(buf, "<time_stats>")) {
            retval = time_stats.parse(mf);
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse time stats in state file"
                );
            }
        } else if (match_tag(buf, "<net_stats>")) {
            retval = net_stats.parse(mf);
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse network stats in state file"
                );
            }
        } else if (match_tag(buf, "<active_task_set>")) {
            retval = active_tasks.parse(mf);
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse active tasks in state file"
                );
            }
        } else if (parse_str(buf, "<platform_name>", statefile_platform_name)) {
            continue;
        } else if (parse_int(buf, "<user_run_request>", retval)) {
            run_mode.set(retval, 0);
            continue;
        } else if (parse_int(buf, "<user_network_request>", retval)) {
            network_mode.set(retval, 0);
            continue;
        } else if (parse_int(buf, "<core_client_major_version>", old_major_version)) {
        } else if (parse_int(buf, "<core_client_minor_version>", old_minor_version)) {
        } else if (parse_int(buf, "<core_client_release>", old_release)) {
        } else if (match_tag(buf, "<cpu_benchmarks_pending/>")) {
            run_cpu_benchmarks = true;
        } else if (match_tag(buf, "<work_fetch_no_new_work/>")) {
            work_fetch_no_new_work = true;
        } else if (match_tag(buf, "<proxy_info>")) {
            retval = proxy_info.parse(mf);
            if (retval) {
                msg_printf(NULL, MSG_ERROR,
                    "Can't parse proxy info in state file"
                );
            }
        } else if (parse_str(buf, "<host_venue>", main_host_venue, sizeof(main_host_venue))) {
        } else if (parse_double(buf, "<new_version_check_time>", new_version_check_time)) {
        } else if (parse_str(buf, "<newer_version>", newer_version)) {
        } else {
            if (log_flags.unparsed_xml) {
                msg_printf(0, MSG_ERROR,
                    "[unparsed_xml] state_file: unrecognized: %s", buf
                );
            }
        }
    }
    fclose(f);
    return 0;
}


// Write the client_state.xml file
//
int CLIENT_STATE::write_state_file() {
    MFILE mf;
    int retval, ret1, ret2;
#ifdef _WIN32
    char win_error_msg[4096];
#endif

    if (log_flags.state_debug) {
        msg_printf(0, MSG_INFO,
            "[status_debug] CLIENT_STATE::write_state_file(): Writing state file"
        );
    }
#ifdef _WIN32
    retval = mf.open(STATE_FILE_NEXT, "wc");
#else
    retval = mf.open(STATE_FILE_NEXT, "w");
#endif
    if (retval) {
        msg_printf(0, MSG_ERROR,
            "Can't open temporary state file: %s %s",
            STATE_FILE_NEXT, boincerror(retval)
        );
        return ERR_FOPEN;
    }
    MIOFILE miof;
    miof.init_mfile(&mf);
    ret1 = write_state(miof);
    ret2 = mf.close();
    if (ret1) return ret1;
    if (ret2) return ret2;

    // only attempt to rename the current state file if it
    //   exists.
    //
    if (boinc_file_exists(STATE_FILE_NAME)) {
        if(boinc_file_exists(STATE_FILE_PREV)) {
            retval = boinc_delete_file(STATE_FILE_PREV);
#ifdef _WIN32
            if (retval) {
                msg_printf(0, MSG_ERROR,
                    "Can't delete previous state file; %s",
                    windows_error_string(win_error_msg, sizeof(win_error_msg))
                );
            }
#endif
        }
        
        retval = boinc_rename(STATE_FILE_NAME, STATE_FILE_PREV);
#ifdef _WIN32
        if (retval) {
            msg_printf(0, MSG_ERROR,
                "Can't rename current state file to previous state file; %s",
                windows_error_string(win_error_msg, sizeof(win_error_msg))
            );
        }
#endif
    }

    retval = boinc_rename(STATE_FILE_NEXT, STATE_FILE_NAME);
    if (log_flags.state_debug) {
        msg_printf(0, MSG_INFO,
            "[status_debug] CLIENT_STATE::write_state_file(): Done writing state file"
        );
    }
    if (retval) {
#ifdef _WIN32
        if (ERROR_ACCESS_DENIED == retval) {
            msg_printf(0, MSG_ERROR,
                "Can't rename state file; access denied; check file and directory permissions"
            );
        } else {
            msg_printf(0, MSG_ERROR,
                "Can't rename state file; %s",
                windows_error_string(win_error_msg, sizeof(win_error_msg))
            );
        }
#else
        msg_printf(0, MSG_ERROR,
            "Can't rename state file; check file and directory permissions"
        );
#endif
        return ERR_RENAME;
    }
    return 0;
}

int CLIENT_STATE::write_state(MIOFILE& f) {
    unsigned int i, j;
    int retval;

    f.printf("<client_state>\n");
    retval = host_info.write(f);
    if (retval) return retval;
    retval = time_stats.write(f, false);
    if (retval) return retval;
    retval = net_stats.write(f);
    if (retval) return retval;
    for (j=0; j<projects.size(); j++) {
        PROJECT* p = projects[j];
        retval = p->write_state(f);
        if (retval) return retval;
        for (i=0; i<apps.size(); i++) {
            if (apps[i]->project == p) {
                retval = apps[i]->write(f);
                if (retval) return retval;
            }
        }
        for (i=0; i<file_infos.size(); i++) {
            if (file_infos[i]->project == p) {
                retval = file_infos[i]->write(f, false);
                if (retval) return retval;
            }
        }
        for (i=0; i<app_versions.size(); i++) {
            if (app_versions[i]->project == p) app_versions[i]->write(f);
        }
        for (i=0; i<workunits.size(); i++) {
            if (workunits[i]->project == p) workunits[i]->write(f);
        }
        for (i=0; i<results.size(); i++) {
            if (results[i]->project == p) results[i]->write(f, false);
        }
        p->write_project_files(f);
    }
    active_tasks.write(f);
    f.printf(
        "<platform_name>%s</platform_name>\n"
        "<core_client_major_version>%d</core_client_major_version>\n"
        "<core_client_minor_version>%d</core_client_minor_version>\n"
        "<core_client_release>%d</core_client_release>\n"
        "<user_run_request>%d</user_run_request>\n"
        "<user_network_request>%d</user_network_request>\n"
        "%s"
        "<new_version_check_time>%f</new_version_check_time>\n",
        platform_name,
        core_client_major_version,
        core_client_minor_version,
        core_client_release,
        run_mode.get_perm(),
        network_mode.get_perm(),
        cpu_benchmarks_pending?"<cpu_benchmarks_pending/>\n":"",
        new_version_check_time
    );
    if (newer_version.size()) {
        f.printf("<newer_version>%s</newer_version>\n", newer_version.c_str());
    }

    proxy_info.write(f);
    if (strlen(main_host_venue)) {
        f.printf("<host_venue>%s</host_venue>\n", main_host_venue);
    }
    f.printf("</client_state>\n");
    return 0;
}

// Write the client_state.xml file if necessary
// TODO: write no more often than X seconds
//
int CLIENT_STATE::write_state_file_if_needed() {
    int retval;
    if (client_state_dirty) {
        client_state_dirty = false;
        retval = write_state_file();
        if (retval) return retval;
    }
    return 0;
}

// look for app_versions.xml file in project dir.
// If find, get app versions from there,
// and use "anonymous platform" mechanism for this project
//
void CLIENT_STATE::check_anonymous() {
    unsigned int i;
    char dir[256], path[256];
    FILE* f;
    int retval;

    for (i=0; i<projects.size(); i++) {
        PROJECT* p = projects[i];
        get_project_dir(p, dir);
        sprintf(path, "%s/%s", dir, APP_INFO_FILE_NAME);
        f = fopen(path, "r");
        if (!f) continue;
        msg_printf(p, MSG_INFO,
            "Found %s; using anonymous platform", APP_INFO_FILE_NAME
        );

        p->anonymous_platform = true;
            // flag as anonymous even if can't parse file
        retval = parse_app_info(p, f);
        fclose(f);
    }
}

int CLIENT_STATE::parse_app_info(PROJECT* p, FILE* in) {
    char buf[256];
    MIOFILE mf;
    mf.init_file(in);

    while (fgets(buf, 256, in)) {
        if (match_tag(buf, "<app_info>")) continue;
        if (match_tag(buf, "</app_info>")) return 0;
        if (match_tag(buf, "<file_info>")) {
            FILE_INFO* fip = new FILE_INFO;
            if (fip->parse(mf, false)) {
                delete fip;
                continue;
            }
            if (link_file_info(p, fip)) {
                delete fip;
                continue;
            }
            fip->status = FILE_PRESENT;
            file_infos.push_back(fip);
            continue;
        }
        if (match_tag(buf, "<app>")) {
            APP* app = new APP;
            if (app->parse(mf)) {
                delete app;
                continue;
            }
            if (lookup_app(p, app->name)) {
                delete app;
                continue;
            }
            link_app(p, app);
            apps.push_back(app);
            continue;
        }
        if (match_tag(buf, "<app_version>")) {
            APP_VERSION* avp = new APP_VERSION;
            if (avp->parse(mf)) {
                delete avp;
                continue;
            }
            if (gstate.link_app_version(p, avp)) {
                delete avp;
                continue;
            }
            link_app_version(p, avp);
            app_versions.push_back(avp);
            continue;
        }
        msg_printf(p, MSG_ERROR, "Unparsed line in app_info.xml: %s", buf);
    }
    return ERR_XML_PARSE;
}

int CLIENT_STATE::write_state_gui(MIOFILE& f) {
    unsigned int i, j;
    int retval;

    f.printf("<client_state>\n");

    retval = host_info.write(f);
    if (retval) return retval;
    retval = time_stats.write(f, false);
    if (retval) return retval;
    retval = net_stats.write(f);
    if (retval) return retval;

    for (j=0; j<projects.size(); j++) {
        PROJECT* p = projects[j];
        retval = p->write_state(f, true);
        if (retval) return retval;
        for (i=0; i<apps.size(); i++) {
            if (apps[i]->project == p) {
                retval = apps[i]->write(f);
                if (retval) return retval;
            }
        }
        for (i=0; i<app_versions.size(); i++) {
            if (app_versions[i]->project == p) app_versions[i]->write(f);
        }
        for (i=0; i<workunits.size(); i++) {
            if (workunits[i]->project == p) workunits[i]->write(f);
        }
        for (i=0; i<results.size(); i++) {
            if (results[i]->project == p) results[i]->write_gui(f);
        }
    }
    f.printf(
        "<platform_name>%s</platform_name>\n"
        "<core_client_major_version>%d</core_client_major_version>\n"
        "<core_client_minor_version>%d</core_client_minor_version>\n"
        "<core_client_release>%d</core_client_release>\n"
        "%s",
        platform_name,
        core_client_major_version,
        core_client_minor_version,
        core_client_release,
        work_fetch_no_new_work?"<work_fetch_no_new_work/>\n":""
    );

    global_prefs.write(f);

    if (strlen(main_host_venue)) {
        f.printf("<host_venue>%s</host_venue>\n", main_host_venue);
    }

    f.printf("</client_state>\n");
    return 0;
}

int CLIENT_STATE::write_tasks_gui(MIOFILE& f) {
    unsigned int i;
    
    for (i=0; i<results.size(); i++) {
        RESULT* rp = results[i];
        rp->write_gui(f);
    }
    return 0;
}

int CLIENT_STATE::write_file_transfers_gui(MIOFILE& f) {
    unsigned int i;

    f.printf("<file_transfers>\n");
    for (i=0; i<file_infos.size(); i++) {
        FILE_INFO* fip = file_infos[i];
        if (fip->pers_file_xfer
           || (fip->upload_when_present && fip->status == FILE_PRESENT && !fip->uploaded)
        ) {
            fip->write_gui(f);
        }
    }
    f.printf("</file_transfers>\n");

    return 0;
}

const char *BOINC_RCSID_375ec798cc = "$Id: cs_statefile.C,v 1.80 2006/11/10 17:55:16 boincadm Exp $";
